#include<iostream>
using namespace std;

void swap(const int&a,const int &b){
	//int temp = a;
	//a = b; b = temp;
	//error
}
int main(){

	int x = 5;
	int y = 6;
	swap(x, y);
	cout << x << y << endl;
	system("pause");
	return 0;
}
